Flight Intent
The pilot of the helicopter intended to proceed to Mount St. Helens and land near Spirit Lake. Upon arrival, the winds in the vicinity of the desired landing point were too strong for a safe landing.
Alternate Landing Site
An alternate landing spot was selected below the ridge line. This location was presumably sheltered from the wind.
Approach and Descent
Late in the approach hover, the aircraft began a sudden side drift which could not be arrested. The pilot reported that a strong gust of wind had blown the aircraft out over the back side of the ridge. When the helicopter moved out of ground effect, it began to settle and the pilot was unable to stop the descent.
Impact and Damage
The impact forces were sufficient to damage the aircraft beyond economical repair. The density altitude was about 6200 feet.